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Mathematics 9 Online
OpenStudy (xxstudyingstuffxx):

In a bag containing black and white marbles, 3/8 of the marbles are black. Which could be the numbers of black and white marbles in the bag? A. 3 black and 8 white B. 12 black and 20 white C. 20 black and 12 white D. 8 black and 3 white

OpenStudy (scoobydo):

maybe B or D

OpenStudy (xxstudyingstuffxx):

I think it is B.

OpenStudy (scoobydo):

me to

OpenStudy (igreen):

@scoobydo Don't give answers.

OpenStudy (igreen):

B is correct @XxStudyingStuffxX

OpenStudy (xxstudyingstuffxx):

The ratio of black marbles to white is 3 to 5. 3 goes into 12 four times and 5 goes into 20 four times. So, the ratio is 12:20.

OpenStudy (igreen):

3/8 of the marbles are black. There are 8 total marbles. 8 - 3 = 5 5 marbles are white. 3/5 Multiply by 4: 12/20

OpenStudy (igreen):

@scoobydo I didn't. I checked their work.

OpenStudy (igreen):

There's a difference.

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